1 Corinthians 16:10
Now if Timotheus come, see that he may be with you without fear: for he worketh the work of the Lord, as I also do.
Cross-reference
In 1 Corinthians 16:11, Paul continues urging respectful treatment of Timothy and a peaceful send-off.
1 Corinthians 4:17 explains Paul sent Timothy to remind them of his ways—the same Timothy doing the Lord's work in 16:10.
Acts 19:22 shows Paul sending Timothy on mission earlier — the same Timothy Paul now commends to the Corinthians.
Romans 16:21 calls Timothy Paul's co-worker — reinforcing the partnership and authority Paul gives him here.
Philippians 2:19-22 describes Timothy's proven character and partnership with Paul in the gospel — the same faithful worker Paul now sends.
1 Thessalonians 3:2 shows Paul sending Timothy to strengthen believers — the same role as co-worker in the gospel that Paul commends here.
In 2 Corinthians 1:1, Timothy is named as Paul's co-sender, confirming his role as a trusted fellow worker introduced in the main verse.
In Philippians 1:1, Timothy is again a co-author, reinforcing his partnership with Paul in gospel work as mentioned in the main verse.
In 1 Timothy 4:12, Paul tells Timothy to not let others despise his youth — directly relevant to why Paul wants him put at ease in Corinth.